2006 monterey radiator fan stuck what to do
 

I just bought a 2006 mercury monterey and just realized that one of the radiators fans is hard stuck a tried to push it with my hands but runs and stucks again so Im going to buy new fans but want to know what is best to unplug this fan or to keep it plug I dont know how long this problems has been and dont want to fry any electronics by keeping plug or unpluged what should I do need to drive it to get it fixed.

Thank you.